Robert Sesselmann of the far-right Alternative for Germany (AfD) party speaks at an election event in Sonneberg, last weekend, (Photo by Ferdinand Merzbach / AFP) Robert Sesselmann, a local lawyer, has rocked Germany’s political boat. The first politician from the far-right Alternative für Deutschland (AfD) elected Landrat, the equivalent of head of a county council, he has singlehandedly forced mainstream politicians to contemplate collaboration with the previously untouchable decade-old party. The AfD upsurge comes as in other European states similar young anti-immigrant parties also appear likely to step from the margins into power-wielding office. Notably in Spain where Vox, now...